Two years after losing their son Kakeru, Otone and her husband Kensuke take into their lives a humanoid from a company that rents humanoids to bereaved families as replacements for lost loved ones. The robot looks and behaves exactly like Kakeru, with Otone embracing its arrival as Kensuke struggles to accept it. Living with “him” seems to restore the flow of time within the family, yet gradually exposes the unspoken wounds and lingering regrets each parent carries after the loss. All the while, he begins to slip away to meet other humanoid children, unnoticed by the parents.